DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST BY INTELLIGENT TESTER (SKID CONTROL BUZZER)
INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)
INSPECT SKID CONTROL BUZZER
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)
VEHICLE STABILITY CONTROL SYSTEM (w/ VDIM) - Skid Control Buzzer Circuit
DESCRIPTION
The skid control buzzer sounds while the accumulator pressure is abnormally low or when an abnormality causing low fluid pressure occurs, and then the VSC is activated.
WIRING DIAGRAM
INSPECTION PROCEDURE
- When replacing the skid control ECU, perform zero point calibration and store system information .
| 1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (SKID CONTROL BUZZER) |
Connect the intelligent tester to the DLC3.
Select the Active Test mode on the intelligent tester.
ABS / VSC:| Item (Display) | Vehicle Condition / Test Details | Diagnostic Note |
| Buzzer | Turns skid control buzzer ON / OFF | Buzzer can be heard |
Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the intelligent tester.
- Result:
| Condition | Proceed to |
| Buzzer does not sound or sounds constantly | A |
| Buzzer sounds/stops | B |
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step .
| 2.INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL) |
Turn the engine switch off.
Disconnect the skid control buzzer connector.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
| Tester Connection | Condition | Specified Condition |
| J18-2 - Body ground | Engine switch on (IG) | 10 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
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| 3.INSPECT SKID CONTROL BUZZER |
Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.
- OK:
- Skid control buzzer sounds.
| | REPLACE SKID CONTROL BUZZER |
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| 4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER) |
Turn the engine switch off.
Disconnect the skid control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Condition | Specified Condition |
| J77-11 (BZ) - J18-1 | Always | Below 1 Ω |
| J77-11 (BZ) - Body ground | Always | 10 kΩ or higher |
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part .
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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LEXUS IS250, IS220d / GSE20 ALE20
